Revision is the real story craft of any writing project. Now that you have your first draft on the page, you might think revision is a chore. Having a great process to analyze the manuscript and tighten up the characters, plot, and tension is vital to polishing the gem.
I saw the angel in the marble and carved until I set him free, Michelangelo.
You first draft is that piece of marble. Revision is the act of setting the angel free.